@charset "utf-8";

.nav-main {
    width: 100%;
    height: auto;
    margin: 0 auto;
    display: flex;
    flex-wrap: nowrap;
    justify-content: space-around;
}

.nav-main,
.nav-main .nav-item {
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
}

.nav-main .nav-item {
    line-height: 2em;
    font-size: 16px;
    padding: 0 10px;
    cursor: pointer;
}

.nav-main .nav-item:hover,
.nav-main .nav-item.active {
    background: rgb(58 37 228 / 50%);
}

.tab-main {
    width: 100%;
    height: auto;
}

.tab-item-box {
    display: none;
    padding: 10px;
}

.dl {
    border-bottom: 1px solid #ccc;
    margin: 50px 0 100px;
    padding-bottom: 10px;
}
.dl h4{
    font-size: 20px;
    font-weight: normal;
    line-height: 2em;
}
.dl h4 b{
    margin-right: 5px;
}
.dl .dd,
.dl .dt {
    width: 50%;
}

.dt img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    cursor: pointer;
}

/* =======   遮罩   ====== */
.mark {
    background: rgba(0, 0, 0, 0.5);
    width: 100%;
    min-height: 100vh;
    height: 100%;
    position: fixed;
    z-index: 99;
    margin: 0 auto;
    top: 0;
    left: 0;
    display: none;
}

.mark-main {
    width: 100%;
    height: 100vh;
    display: flex;
}

.mark-content {
    margin: auto;
    width: 95vw;
    height: 90vh;
    text-align: center;
    display: flex;
}

.mark-content img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    cursor: default;
    margin: auto;
}
.close{
    color: #fff;
    font-size: 25px;
    position: absolute;
    right: 15%;
    top: 0;
    cursor: pointer;
    width: 30px;
    height: 30px;
    line-height: 30px;
    border-radius: 50%;
    border: 1px solid #fff;
}